WATCH: CCTV footage shows moment alleged South African gunman kills tourist in Thailand

Chilling CCTV footage shows the moment a South African man allegedly opened the door of a British national's car in Thailand and shot him.

Click 'play full video' to watch the video.

Thai authorities have named 23-year old South African Abel Caldeira Bonito and 27-year old British national Miles Dicken Turner as being wanted in connection with the execution-style murder of Tony Kenway in Pattaya on Tuesday.

According to the Daily Mail, police are reportedly investigating whether a football gambling website set up by Kenway may have caused a rift with rival firms. The father-of-four had been living in Thailand for the last seven years.

In the CCTV footage, the gunman flees the scene on a motorcycle moments after the shot is fired.

Thai PBS reported that Bonito was identified as the gunman from video footage‚ while Turner had rented the bike.

A Facebook page for Bonito describes him as self-employed and living in Orkney‚ South Africa.

Video courtesy the Daily Mail